RRGbank

To change a label, click on a node to select a different label from a list. The syntactic category and the function tag (before and after the dash "-") must be selected separately by clicking on the corresponding part of the label.
To add a function tag to a node that does not have one yet, drag it from the list of function tags onto the node.
Re-attach a node by dragging and dropping it on a new parent. This can be used to created discontinuous constituents.
Similarly, nodes can be removed and new ones added by dragging to/from below the tree.
Finally, the bracketing can be edited manually in the text box below the tree; press "validate" to update the tree. Whitespace is ignored. Each token must have a dedicated POS tag.

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(SENTENCE
  (CLAUSE
    (CORE (NP (CORE_N (NUC_N (N 0=Government) (N 1=officials)))) (NUC (V 2=said)) (. 20=.))
    (CLAUSE
      (CORE
        (NP
          (CORE_N
            (NUC_N (N 3=exports))
            (PP-PERI
              (CORE_P
                (NUC_P (P 4=at))
                (NP
                  (OP-DEF 5=the)
                  (CORE_N (NUC_N (N 6=end)))
                  (PP
                    (CORE_P
                      (NUC_P (P 7=of))
                      (NP (OP-DEF 8=the) (CORE_N (NUC_N (N 9=year)))))))))))
        (OP-MOD 10=would)
        (NUC (V 11=remain))
        (PP-PERI
          (CORE_P
            (NUC_P (P 12=under))
            (NP
              (OP-DEF 13=a)
              (CORE_N (NUC_N (N 14=government) (N 15=target)))
              (PP
                (CORE_P
                  (NUC_P (P 16=of))
                  (NP
                    (CORE_N
                      (NUC_N (N 17=$))
                      (QP (CORE_Q (NUC_Q (QNT 18=68) (QNT 19=billion)))))))))))))))

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(SENTENCE
  (CLAUSE
    (CLAUSE
      (OP-TNS 10=would)
      (CORE
        (PP-PERI
          (CORE_P
            (NUC_P (P 12=under))
            (NP
              (CORE_N
                (NUC_N (N 15=target) (N 14=government))
                (PP-PERI
                  (CORE_P
                    (NUC_P (P 16=of))
                    (NP
                      (CORE_N
                        (NUC_N (N 17=$))
                        (QP (CORE_Q (NUC_Q (QNT 19=billion) (QNT 18=68)))))))))
              (OP-DEF 13=a))))
        (NP
          (CORE_N
            (NUC_N (N 3=exports))
            (PP-PERI
              (CORE_P
                (NUC_P (P 4=at))
                (NP
                  (CORE_N
                    (NUC_N (N 6=end))
                    (PP-PERI
                      (CORE_P
                        (NUC_P (P 7=of))
                        (NP (CORE_N (NUC_N (N 9=year))) (OP-DEF 8=the)))))
                  (OP-DEF 5=the))))))
        (NUC (V 11=remain))))
    (CORE (NP (CORE_N (NUC_N (N 1=officials) (N 0=Government)))) (NUC (V 2=said)))
    (. 20=.)))

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Supertags

	token	arc	supertag
1	Government	2	(NUC_N* (N <>))
2	officials	3	(NP (CORE_N (NUC_N (N <>))))
3	said	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (V <>))) (CLAUSE )))
4	exports	12	(NP (CORE_N (NUC_N (N <>))))
5	at	4	(CORE_N* (PP-PERI (CORE_P (NUC_P (P <>)) (NP ))))
6	the	7	(NP* (OP-DEF <>))
7	end	5	(NP (CORE_N (NUC_N (N <>)) (PP )))
8	of	7	(PP (P <>) (NP ))
9	the	10	(NP* (OP-DEF <>))
10	year	8	(NP (CORE_N (NUC_N (N <>))))
11	would	12	(CORE* (OP-MOD <>))
12	remain	3	(CLAUSE (CORE (NP ) (NUC (V <>)) (PP )))
13	under	12	(PP (CORE_P (NUC_P (P <>)) (NP )))
14	a	16	(NP* (OP-DEF <>))
15	government	16	(NUC_N* (N <>))
16	target	13	(NP (CORE_N (NUC_N (N <>)) (PP )))
17	of	16	(PP (P <>) (NP ))
18	$	17	(NP (CORE_N (NUC_N (N <>))))
19	68	20	(NUC_Q* (QNT <>))
20	billion	18	(CORE_N* (QP (CORE_Q (NUC_Q (QNT <>)))))
21	.	0	(SENTENCE (. <>))